Squalus blainville, Longnose spurdog : fisheries

Squalus blainville (Risso, 1827)

Longnose spurdog
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Squalus blainville   AquaMaps   Data sources: GBIF OBIS
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Squalus blainville
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分類 / Names 共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

板鰓亜鋼(サメとエイ類) (sharks and rays) > Squaliformes (Bramble, sleeper and dogfish sharks) > Squalidae (Dogfish sharks)
Etymology: Squalus: Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436).  More on author: Risso.

Environment: milieu / climate zone / depth range / distribution range 生態学

; 海; 汽水性の 底生の; 深さの範囲 16 - 780 m (Ref. 56504).   Subtropical; 11°C - 18°C (Ref. 54892); 50°N - 29°S, 17°W - 43°E (Ref. 54892)

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Eastern Atlantic: Bay of Biscay to Mediterranean, Morocco, Senegal to Namibia (these records may include other species in addition to Squalus blainvillei). Although reported from the Canary Islands (e.g. Ref. 247), it is most likely based on misidentifications of Squalus megalops (Ref. 6808). Western Pacific: southern Japan and Taiwan. Nominal records of Squalus blainville or Squalus fernandinus from the western Atlantic (North Carolina, USA to northern Gulf of Mexico; Argentina), Indian Ocean (South Africa, Mozambique, Madagascar, Tanzania and India) and the Pacific (Australia, New Zealand, New Caledonia, Hawaii and northern Chile), as well as some records from the northwest Pacific and eastern Atlantic are based at least in part on Squalus mitsukurii and possibly other species. Whether Squalus blainville itself is as wide-ranging as reported for blainville-group dogfishes (including Squalus mitsukurii) remains to be determined.

Length at first maturity / サイズ / 重さ / 年齢

Maturity: Lm 56.8, range 57 - 58 cm
Max length : 100.0 cm TL オス/雌雄の選別がない; (Ref. 36731); 最大公表体重: 1.7 kg (Ref. 115885)

生物学     用語集 (例 epibenthic)

Found on the continental shelves and upper slopes. Depth range from 16-440 m (Ref. 0247), and from 300-780m in the eastern Ionian Sea (Ref. 56504). Forms schools. Off West Africa, water temperature and salinity where this species is often found ranges from 11-18°C and 36 ppt. (at 16 to 255 m depth), respectively. Feeds on bony fishes, like denticids, mackerel and percichthyids, as well as crabs, lobsters, and octopi. Ovoviviparous, with 3 to 4 young per litter. Utilized fresh, dried salted and smoked for human consumption.

Life cycle and mating behavior 成熟 | 繁殖 | 放精 | | 生産力 | 幼生

Distinct pairing with embrace (Ref. 205). Ovoviviparous, with 3 to 4 young per litter. Young born at about 23 cm (Ref. 247).

主な参考文献 Upload your references | 参考文献 | コーディネーター : Compagno, Leonard J.V. | 協力者

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)

IUCNのレッドリストの状況は (Ref. 120744)

  欠足データ (DD) ; Date assessed: 01 December 2008

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 商業
FAO(水産業: 代謝, 種の外形; publication : search) | FishSource | 私達の周りの海

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Estimates based on models

Preferred temperature (Ref. 115969): 10.3 - 15.6, mean 13.4 (based on 273 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00309 (0.00248 - 0.00385), b=3.07 (3.01 - 3.13), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
栄養段階 (Ref. 69278):  4.0   ±0.4 se; Based on diet studies.
回復力 (Ref. 120179):  非常に低い, 14年以上の倍増期間の最小個体群 (K=0.10-0.14; Fec=3).
弱み (Ref. 59153):  High to very high vulnerability (67 of 100) .
価格帯 (Ref. 80766):   Medium.